/* SPDX-License-Identifier: GPL-2.0-only */ #include <acpi/acpi_device.h> #include <acpi/acpigen.h> #include <console/console.h> #include <device/i2c_simple.h> #include <device/device.h> #include <device/path.h> #include <string.h> #include "chip.h" #define I2C_SX9360_ACPI_ID "STH9360" #define I2C_SX9360_CHIP_NAME "Semtech SX9360" static void i2c_sx9360_fill_ssdt(const struct device *dev) { struct drivers_i2c_sx9360_config *config = dev->chip_info; const char *scope = acpi_device_scope(dev); struct acpi_i2c i2c = { .address = dev->path.i2c.device, .mode_10bit = dev->path.i2c.mode_10bit, .speed = I2C_SPEED_FAST, .resource = scope, }; struct acpi_dp *dsd; if (!scope || !config) return; if (config->speed) i2c.speed = config->speed; /* Device */ acpigen_write_scope(scope); acpigen_write_device(acpi_device_name(dev)); acpigen_write_name_string("_HID", I2C_SX9360_ACPI_ID); acpigen_write_name_integer("_UID", config->uid); acpigen_write_name_string("_DDN", config->desc); acpigen_write_STA(acpi_device_status(dev)); /* Resources */ acpigen_write_name("_CRS"); acpigen_write_resourcetemplate_header(); acpi_device_write_i2c(&i2c); if (config->irq_gpio.pin_count) acpi_device_write_gpio(&config->irq_gpio); else acpi_device_write_interrupt(&config->irq); acpigen_write_resourcetemplate_footer(); /* DSD */ dsd = acpi_dp_new_table("_DSD"); /* * Format described in linux kernel documentation. See * https://www.kernel.org/doc/Documentation/devicetree/bindings/iio/proximity/semtech%2Csx9360.yaml */ acpi_dp_add_integer(dsd, "semtech,proxraw-strength", config->proxraw_strength); acpi_dp_add_integer(dsd, "semtech,avg-pos-strength", config->avg_pos_strength); acpi_dp_add_integer(dsd, "semtech,resolution", config->resolution); acpi_dp_write(dsd); acpigen_pop_len(); /* Device */ acpigen_pop_len(); /* Scope */ printk(BIOS_INFO, "%s: %s at %s\n", acpi_device_path(dev), config->desc ? : dev->chip_ops->name, dev_path(dev)); } static const char *i2c_sx9360_acpi_name(const struct device *dev) { static char name[5]; snprintf(name, sizeof(name), "SX%02.2X", dev->path.i2c.device); return name; } static struct device_operations i2c_sx9360_ops = { .read_resources = noop_read_resources, .set_resources = noop_set_resources, .acpi_name = i2c_sx9360_acpi_name, .acpi_fill_ssdt = i2c_sx9360_fill_ssdt, }; static void i2c_sx9360_enable(struct device *dev) { struct drivers_i2c_sx9360_config *config = config_of(dev); if (!is_dev_enabled(dev)) return; dev->ops = &i2c_sx9360_ops; if (config->desc) dev->name = config->desc; } struct chip_operations drivers_i2c_sx9360_ops = { CHIP_NAME(I2C_SX9360_CHIP_NAME) .enable_dev = i2c_sx9360_enable };